There has been a discussion of this subject in another thread,however I felt it might be a good idea to clarify a number of facts. What follows are not my opinions but photographic facts that can be verified in any photographic how to handbook of the 1960’s onward.The first and simplest method is to use supplementary close up lenses,these are inexpensive but can be effective, they are limited in their range.They are also available for TLR cameras, there is a set of two, the upper, applied to the viewing lens corrects for parralax.The second is a ste of extension tubes from film technology.There is usually a set of 3 and they separate for different focussing distances.They are attached to the camera body and are always used with a 50mm lens, they will give 1x1 reproduction.The third method is using camera extension bellows, again attached to the camera body and using a 50mm lens.The final method is the macro lens, this is an innovation of the digital age and gives superb results. I hope I have not been boring you with information you already possess,my apologies if that is the case.